Cap for a mascara unit



FIG. 1 is a left side elevational view of a cap for a mascara unit in accordance with the present design in conjunction with an exemplary mascara unit, the right side being a mirror image thereof; and,

FIG. 2 is front elevational view thereof.

The broken line disclosure of the mascara unit is for illustrative purposes only; and forms no part of the claimed design. 

The ornamental design for a cap for a mascara unit, as shown and described. 